70 results about "Toluidine" patented technology

The invention belongs to the technical field of high polymer material preparation, and particularly relates to a solar interface evaporator with a cross-linked double-layer structure and application. The preparation method comprises the following steps: carrying out primary reaction on 4, 4 '-diphenyl ether dianhydride and biphenyl carboxylic acid, or hexafluorodianhydride, 9, 9-bis (trifluoromethyl)-2, 3, 6, 7-xanthene tetracarboxylic dianhydride and m-bitoluidine in a solvent, blocking by using maleic anhydride to form a polyamide acid solution, adding triethylamine to carry out catalytic reaction, washing, precipitating, filtering and drying to obtain a precursor A and a precursor B; then respectively preparing the precursor A and the precursor B into aqueous solutions, and then adding a photo-thermal material graphene into the aqueous solution B; then, the precursor A solution is poured into a mold to be frozen, then the solution B mixed with the graphene is poured into the mold, freezing and thermal imidization are conducted again, the cross-linked solar interface evaporator of the double-layer structure is obtained, and the evaporator has wide application prospects in the aspects of seawater desalination and sewage treatment.

The invention relates to the field of anti-aging agents DTPD, and particularly discloses a preparation method of the anti-aging agent DTPD. The preparation method of the anti-aging agent DTPD comprises the following steps: mixing aniline and o-toluidine, stirring, heating to 50-60 DEG C, adding hydroquinone and a catalyst, carrying out condensation reaction at 100-250 DEG C, removing evaporated water in the reaction process, and stopping the reaction until water cannot be evaporated; cooling to 100-140 DEG C, filtering while the mixture is hot, and distilling to remove impurities, so as to obtain the anti-aging agent DTPD; the catalyst is selected from one or more of benzene sulfonic acid, benzene disulfonic acid, p-toluenesulfonic acid, p-aminobenzene sulfonic acid, aniline trisulfonic acid and sulfonated halloysite. The preparation method disclosed by the invention has the advantages of high content of effective components in the product, simplicity and convenience in operation and safety.

The invention discloses high-wear-resistance tread rubber for a mine tire and a preparation method of the high-wear-resistance tread rubber, and relates to the technical field of tires. According to the invention, the ATT-Si / AL additive is creatively introduced and used together with carbon black as a wear-resistant main body, and an alkaline accelerator formaldehyde p-toluidine condensation compound and a conventional accelerator are synergistically applied to a wear-resistant tread rubber system for the first time; wherein the accelerator formaldehyde-p-toluidine condensation compound not only provides flat vulcanization characteristic and excellent aging resistance for the rubber material, but also solves the problems of'filler-rubber 'interface weakening and stress concentration caused by high-hardness filler by activating silanization reaction and catalyzing covalent bonding between a sulfur cross-linked network and a rigid filler interface through the alkalinity of the accelerator formaldehyde-p-toluidine condensation compound; the ATT-Si / AL additive and the accelerator formaldehyde p-toluidine condensation compound cooperate to form a physical-chemical dual enhanced network, so that the tread rubber keeps high strength and high wear resistance level under extreme wear.

The application provides a process and equipment for removing m-methylaniline and indole in coking nanofiltration concentrated water, a catalyst and a preparation method thereof, and the water quality of the coking nanofiltration concentrated water is as follows: conductivity 21300-34560 muS / cm, sulfate ion 567-1340 mg / L, m-methylaniline 45-78 mu g / L, and indole 23-39 mu g / L; the process comprises the following treatment steps: the coking nanofiltration concentrated water enters the ozone catalytic tower from the bottom of the tower and flows out from bottom to top, and the ozone catalytic tower is internally provided with a modified peanut shell biochar catalyst; after the ozone catalytic reaction, the water quality of the coking nanofiltration concentrated water is as follows: conductivity 21300-34560 muS / cm, sulfate ion 567-1340 mg / L, m-methylaniline 3-7 mu g / L, and indole 1-6 mu g / L.

The invention provides a method for realizing zero sewage discharge of a 2, 5-diaminotoluene sulfate product, and belongs to the technical field of chemical engineering. Compared with the current method for applying part of wastewater (about 20 tons of wastewater is produced per ton of product) in a factory, the method for realizing zero sewage discharge of the 2, 5-diaminotoluene sulfate product comprises the following steps: extracting and recovering part of o-toluidine by using an extracting agent; the residual wastewater is subjected to Fenton oxidation and triple-effect evaporation to obtain wastewater meeting the discharge standard, and the wastewater is discharged to a sewage treatment plant, so that zero discharge of sewage can be realized.

The invention belongs to the field of reactive dye synthesis, and discloses a preparation process of a reddish brown reactive dye, which comprises the following steps: diazotizing 2-naphthylamine-4, 6, 8-trisulfonic acid, coupling with 1-naphthylamine-7-sulfonic acid to obtain a first-couple material, diazotizing the first-couple material again, coupling with m-toluidine to obtain a second-couple material, refining the second-couple material to obtain a color base, and drying to obtain the reddish brown reactive dye. Carrying out primary condensation on cyanuric chloride and 2, 5-aniline disulfonate to obtain a primary condensation material, carrying out secondary condensation on the primary condensation material and a color base, and filtering the secondary condensation slurry to obtain the reddish brown reactive dye primary stock. The preparation process provided by the invention is stable and low in spray drying energy consumption, and the prepared primary pulp has the advantages of high purity and high solid content, and is excellent in solubility and high in fastness to washing.

The present invention discloses a preparation method of 2-amino-5-chloro-N,3-dimethylbenzamide, belonging to the technical field of organic synthesis. Specifically, o-toluidine is used as a raw material, and after chlorination, Friedel-Crafts acylation, oxidative ring opening and formamidation, 2-amino-5-chloro-N,3-dimethylbenzamide is obtained. The method of the present invention has easily available raw materials, simple process operation, mild reaction conditions, high product yield and less three-waste emissions, and is suitable for industrial production.

The present invention relates to a synergistic antiknock fuel additive comprising a mixture of N-methyl-p-anisidine and m-toluidine in a volume ratio from 45:55 to 95:5; to the use of said fuel additive to increase the octane rating of a gasoline; and to a gasoline fuel composition comprising said fuel additive.

The invention belongs to the technical field of phase change material preparation, and particularly relates to a high-stability composite phase change material and a preparation method thereof. According to the method, an organic solid-liquid phase change material is taken as a solvent, a reaction monomer octadecyl acrylate and a cross-linking agent 1, 6-hexanediol diacrylate are subjected to a cross-linking reaction through a redox initiation system (benzoyl peroxide and N, N-dimethyl-p-toluidine), and the solid-liquid phase change material is prepared. A phase-change high-molecular polymer with a phase-change function is constructed, a coating structure is formed on the organic solid-liquid phase-change material, and finally the composite phase-change material with excellent thermal stability and high latent heat characteristics is prepared. The preparation process disclosed by the invention can be carried out under a low-temperature condition, energy consumption and production cost can be effectively reduced, the process is simple, and batch production is easy; the prepared composite phase change material has wide application prospects in the fields of energy storage, temperature control and the like.

This invention discloses a self-microporous polymer, a self-microporous ion exchange membrane, its preparation method, and its applications, belonging to the field of polymer materials technology. The polymer uses 1,3,5-tris(4-aminophenyl)benzene (TAPB), o-toluidine (DMBP), and dimethylformaldehyde as monomers. Utilizing the rigid, distorted, and non-densely stacked molecular structures of TAPB and DMBP, a polymer material with an inherent sub-nanometer microporous structure and its corresponding homogeneous ion exchange membrane are prepared. The formed self-microporous structure constructs continuous ion transport channels within the membrane, where the sub-nanometer-scale micropores impart a significant size sieving effect, thereby achieving selective separation of monovalent / polyvalent anions. Furthermore, by quaternizing the membrane material, fixed positively charged groups are introduced onto the polymer backbone. These positively charged groups generate significant electrostatic repulsion, enabling selective separation of monovalent / polyvalent cations, particularly suitable for the efficient separation of lithium and magnesium ions.

The invention belongs to the technical field of fungaltoxin detection, and particularly relates to a Raman beacon COF nanoflower and a preparation method and application thereof. The method comprises the following steps: dissolving trialdehyde phloroglucinol, o-bitoluidine and polyvinylpyrrolidone in methanol, carrying out ultrasonic uniform mixing, adding a catalyst to carry out a reaction, adding benzaldehyde after the reaction is finished, continuously carrying out a standing reaction, centrifuging, washing and redissolving to obtain TpDBD-COF nanoflowers, dissolving the TpDBD-COF nanoflowers in a mixed solution of ethanol and water, adding AgNO3, carrying out ultrasonic adsorption, and carrying out vacuum drying to obtain the TpDBD-COF nanoflowers. After adsorption is finished, trisodium citrate is added for a heating reaction, centrifugation, washing and redissolution are performed, and the Raman beacon COF nanoflower is obtained. The COF nanoflower prepared by the invention has a highly enhanced stable Raman signal, the surface group has the advantage of being directly used for biomolecule coupling, and the COF nanoflower can be specifically used for sensitively detecting T-2 toxin in a sample.

The application provides a method for synthesizing 4,4'-diamino-3,3'-dimethyl biphenyl methane, and belongs to the field of organic catalytic synthesis. The method is characterized in that o-toluidine and formaldehyde are used as raw materials, a catalyst and a reaction solvent are added, and 4,4'-diamino-3,3'-dimethyl biphenyl methane is catalytically synthesized. The synthesis route of the application has the advantages of simple reaction operation, mild conditions, avoidance of the use of hydrochloric acid, recyclability of the catalyst, high conversion rate and selectivity of the experiment, and convenience of post-treatment.

To provide a propoxylated 4-toluidine that does not have the disadvantage of N,N-bis(2-hydroxypropyl)-p-toluidine, but can be used at least just as well or better as a polymerization accelerator or as a vulcanization accelerator or as a hardener component for epoxy resins in the polymer systems in which N,N-bis(2-hydroxypropyl)-p-toluidine can be used.SOLUTION: The invention relates to mixtures of propoxylated 4-toluidines containing two or more different di- or tri-propoxylated or higher propoxylated p-toluidines in specific weight ratios, to methods for preparing them and to their use as polymerization accelerators or vulcanization accelerators or as hardener components in epoxy resins.SELECTED DRAWING: None

This application belongs to the technical field of mycotoxin detection technology, specifically relating to a Raman beacon COF nanoflower, its preparation method, and its application. The method involves dissolving trialdehyde phloroglucinol, o-toluidine, and polyvinylpyrrolidone in methanol, ultrasonically mixing, adding a catalyst for reaction, adding benzaldehyde after the reaction, allowing the mixture to stand, centrifuging, washing, and redissolving to obtain TpDBD-COF nanoflowers. These nanoflowers are then dissolved in a mixed solution of ethanol and water, followed by the addition of AgNO3 and ultrasonic adsorption. After adsorption, trisodium citrate is added for heating reaction, centrifuging, washing, and redissolving to obtain the Raman beacon COF nanoflowers. The COF nanoflowers prepared by this invention exhibit a highly enhanced and stable Raman signal, and their surface groups have the advantage of being directly used for biomolecule coupling, specifically for the sensitive detection of T-2 toxin in samples.

This invention discloses a method for synthesizing methyl amino-methyl-phenylcarbamate compounds from p-toluidine. The method uses p-toluidine as a raw material, employs anhydrous zinc acetate catalyst and the green solvent dimethyl carbonate, to first prepare methyl p-toluylcarbamate, followed by one-step direct amination to prepare methyl 2-amino-4-methylphenylcarbamate and methyl 3-amino-4-methylphenylcarbamate. This invention has advantages such as readily available raw materials, an environmentally friendly reaction process, high atom utilization, and a first-step reaction yield of up to 96% and a second-step reaction yield of up to 35.7%.

The present invention relates to a process for the preparation of toluene-2, 5-diamine or a salt thereof. The invention also relates to a method for preparing the toluene-2, 5-diamine sulfate. According to the method, carcinogenic and allergenic raw materials (such as o-toluidine) are not used, a brand-new synthesis route is adopted, and the method has the advantages that the used initial raw materials are easy to obtain, the reaction environment is safe, operation is easy, an intermediate is stable and easy to separate, and no use-prohibited components (such as o-toluidine) are used or generated.

The present application provides a long-life low-friction grease composition and a preparation method thereof. The grease composition comprises the following raw materials by weight: 20-35 parts of high-alkaline calcium sulfonate, 50-65 parts of base oil, 2-6 parts of diisocyanate, 1-5 parts of p-toluidine, 0.5-2 parts of urea, 1-4 parts of conversion agent, 1-2 parts of calcium carbonate, 1-2 parts of calcium hydroxide, 1-4 parts of small-molecule acid, 3-5 parts of fatty acid, 0.5-2 parts of solid friction-reducing agent, 0.5-3 parts of antioxidant, 0.5-2 parts of surfactant, and 0.5-2 parts of passivator. The grease composition has excellent friction-reducing capacity and extreme pressure performance, and has a long service life.

The present invention discloses a high-toughness non-woven fabric for homogeneous bags and a preparation method thereof, relating to the field of new materials technology. The high-toughness non-woven fabric for homogeneous bags produced in the present invention is produced by post-finishing a hydrophilic polyethylene non-woven fabric with a finishing agent. The hydrophilic polyethylene non-woven fabric is produced by first grafting glycidyl methacrylate onto the surface of the polyethylene non-woven fabric by electron beam radiation and then reacting with hydrophilic polylactic acid, thereby enhancing the hydrophilicity of the polyethylene non-woven fabric. The modified polyether ester is produced by reacting a modified phenolic resin with 2,5-furandicarboxylic acid and then with tributyl citrate. The modified phenolic resin is produced by reacting a phenolic resin with o-toluidine, thereby enhancing the toughness of the non-woven fabric.

The invention discloses an m-toluidine compound, a preparation method thereof and application of the m-toluidine compound in a thermosensitive color developing agent, and relates to the technical field of color developing agents. The invention discloses a m-toluidine compound which is # imgabs0 #. Compared with a contrast product, the thermosensitive color developing agent prepared by the invention has the advantages that the overall activation temperature is reduced, the color developing reaction is easier to trigger, the color developing temperature range is widened, and the differential requirements of more different application scenes on the temperature can be met. The temperature-sensitive color developing agent prepared from the m-toluidine compound has higher color developing contrast and more obvious color depth in color developing effect, can present clearer and brighter color developing result, and is beneficial to improving the visual effect of a temperature-sensitive color developing technology in scenes such as temperature-sensitive printing and the like.

The invention discloses low-modulus bone cement and a preparation method thereof. The solid-to-liquid ratio of powder to liquid is (2g-3g): 1mL; the powder is prepared from the following raw materials in percentage by mass: 52 to 89.5 percent of acrylic resin, 10 to 40 percent of barium sulfate and 0.5 to 8 percent of powdery phospholipid; the liquid is prepared from the following raw materials: 0.5 percent to 5 percent of N, N-dimethyl p-toluidine, 0.05 percent to 2 percent of hydroquinone and 93 percent to 99.45 percent of methyl methacrylate. The powdery phospholipid is introduced into the bone cement powder to modify the bone cement, so that the overhigh elastic modulus of the bone cement is reduced, and secondary injuries such as fracture of adjacent vertebral bodies caused by the high elastic modulus after the bone cement is filled are prevented. Meanwhile, the powdery phospholipid is uniformly distributed in the bone cement, so that the requirement that the bone cement compression strength is greater than or equal to 70MPa according to a bone cement forcing standard is met, and the requirement of human body mechanical strength support is ensured.

The application discloses a cold storage and heat preservation plastic foam and a preparation method thereof. The combined material formula comprises a boric acid polyether polyol and a high-hydroxyl-value o-toluidine polyether polyol. The boric acid polyether polyol has a characteristic of a triangular stable structure of boron atoms, and can improve the strength and dimensional stability of a plastic product and delay the attenuation of the strength and dimensional stability of the plastic product in application. The boric acid polyether polyol contains a part of insoluble B=O structure, which is easy to precipitate in the early stage of the reaction of the combined material with isocyanate, forms stable nucleation points, and through the synergistic effect of the high-hydroxyl-value o-toluidine polyether polyol, the cross-linking of product foam fibers is enhanced, the bubbles are inhibited and the bubbles are made more delicate, and the thermal conductivity of the product is reduced. The rapid cross-linking can reduce the volatilization of a foaming agent and reduce the surface bubbles at the end of product flow.

The invention belongs to the field of vinyl elastomers, and particularly relates to a flame-retardant high-strength polyethylene blow molding material and a preparation method thereof.The flame-retardant high-strength polyethylene blow molding material is prepared from 100 parts of high-density polyethylene, 20-30 parts of organic montmorillonite modified flame retardant, 3-5 parts of maleic anhydride grafted polyethylene, 0.3-0.5 part of composite antioxidant and 0.5-1.5 parts of polyethylene wax; the preparation method comprises the following steps: dispersing long-chain organized montmorillonite in toluene, adding gamma-aminopropyltriethoxysilane and triethylamine, and carrying out a reflux reaction at 80 DEG C under the protection of nitrogen for 6 hours to obtain long-chain organized montmorillonite containing active amino groups; the preparation method comprises the following steps: re-dispersing long-chain organic montmorillonite containing active amino groups in toluene, adding pentaerythritol spiro-phosphoryl p-toluidine, and carrying out a reflux reaction; the organic montmorillonite modified flame retardant is obtained; the flame-retardant high-strength polyethylene blow molding material prepared from the organic montmorillonite modified flame retardant has efficient flame retardance and excellent mechanical properties.

The present invention provides a polyimide film, comprising: a copolymer obtained by copolymerizing a dianhydride monomer comprising pyromellitic dianhydride (PMDA) and a diamine monomer comprising 4, 4 '-diaminodiphenyl ether (ODA) and m-bitoluidine (m-TD), wherein the film has a coefficient of thermal expansion (CTETD) in a transverse direction (TD) measured at a temperature range of 50 DEG C to 200 DEG C and a temperature rise rate of 10 DEG C / min of-5 ppm / DEG C to 2.5 ppm / DEG C, and a modulus of 8 GPa or more.

The invention relates to high-sensitivity nitrite detection test paper and a preparation method thereof.The test paper comprises a detection base layer, the detection base layer contains a nitrite ion reaction substrate, the nitrite ion reaction substrate is red after making contact with nitrite ions, different nitrite ion concentrations are distinguished through different color gradations of the color, and the nitrite ion concentration is different from that of the nitrite ion reaction substrate. The detection base layer is soaked in a feed liquid and then is dried to obtain the high-sensitivity nitrite detection test paper, the feed liquid contains a nitrite ion reaction substrate and a pH regulator, and the nitrite ion reaction substrate is selected from one or more of aniline, p-toluidine, aminonaphthalene and Klehu acid. Compared with the prior art, the method provided by the invention has the characteristics of accurate concentration indication and high sensitivity, and especially when the nitrite concentration is low, the color gradation of different concentrations is clear.

The application discloses a low-modulus bone cement and a preparation method thereof, and the solid-liquid ratio of powder and liquid is 2g-3g:1mL; the powder comprises the following raw materials in percentage by mass: 52%-89.5% of acrylic resin, 10%-40% of barium sulfate and 0.5%-8% of powdered phospholipid; and the liquid comprises the following raw materials: 0.5%-5% of N, N-dimethyl-p-toluidine, 0.05%-2% of hydroquinone and 93%-99.45% of methyl methacrylate. The powdered phospholipid is introduced into the bone cement powder to modify the bone cement, reduce the excessively high elastic modulus of the bone cement and prevent secondary injuries such as the fracture of adjacent vertebral bodies caused by the high elastic modulus of the bone cement after filling. Meanwhile, the powdered phospholipid is uniformly distributed in the bone cement, meets the requirement of the bone cement compression strength≥70MPa in the bone cement forced standard and guarantees the demand of human mechanical strength support.

The application provides a preparation method of direct-spun brown, and belongs to the technical field of dye synthesis, and comprises the following steps: 1) mixing and reacting 4,4'-diamino benzoyl toluidine with a sodium nitrite solution under low-temperature conditions to generate a diazonium salt solution; 2) controlling the speed of dropping the diazonium salt solution into a coupling component, stirring and reacting to obtain a primary coupling product solution; 3) in the presence of a biodegradable cosolvent, the primary coupling product solution is added into gamma acid in batches for mixing and reacting, and the material concentration in the reaction system is controlled, and when the solid content of the reaction solution is greater than or equal to 45 %, the reaction is considered to be completed, and a secondary coupling product solution is obtained; and 4) directly performing spray drying on the secondary coupling product solution to obtain a direct-spun brown product. The method improves the standard degree and saturation of the color light of the product, the color light deviation ΔE is less than or equal to 1.0, the saturation reaches more than 95 % of a standard sample, the solid content of the secondary coupling reaction is improved, the purification process is eliminated, and the production cost is reduced.

Provided is a polyimide film including: a block copolymer including a dianhydride monomer including pyromellitic dianhydride (PMDA), and a diamine monomer including 4, 4 '-diaminodiphenyl ether (ODA) and m-bitoluidine (m-TD), in which a water absorption rate measured after storage in water at room temperature (20 DEG C to 25 DEG C) for at least one day is 2.5% or less, and a water absorption rate measured after storage in water at room temperature (20 DEG C to 25 DEG C) for at least one day is 2.5% or less; and the moisture absorption rate measured after being stored for at least one day in a constant temperature and humidity chamber (at a temperature of 25 DEG C and a humidity of 50%) is 1.5% or less.

The present invention discloses a meta-toluidine compound, a preparation method thereof, and an application in a thermal color developer, and relates to the technical field of color developers. A meta-toluidine compound is. Compared with comparative products, the thermal color developer prepared by the present invention has a decreasing trend in overall activation temperature, is easier to trigger a color development reaction, broadens the color development temperature range, and can meet the differentiated temperature requirements of more different application scenarios. The thermal color developer prepared using the meta-toluidine compound of the present invention has a higher color contrast and a more significant color depth in color development effect, and can present a clearer and more vivid color development result, which helps to improve the visualization effect of thermal color development technology in scenarios such as thermal printing.

The present invention provides a low-dielectric polyimide film with excellent dimensional stability and heat resistance, comprising a block copolymer containing a first block and a second block. The first block is obtained by imidizing an acid dianhydride component containing biphenyl dianhydride (BPDA) with a diamine component containing p-phenylenediamine (PPD). The second block is obtained by imidizing an acid dianhydride component containing benzophenone tetracarboxylic dianhydride (BTDA) and pyromellitic dianhydride (PMDA) with a diamine component containing m-tolidine.

The present invention is a method for using a vanadium element as a catalyst in the reaction of toluene and a hydroxylamine salt to produce toluidine. The method comprises the following steps: adding glacial acetic acid, deionized water, hydroxylamine hydrochloride, toluene, and a vanadium element to a reactor with a stirring and condensing reflux device, heating the reactor to 60-100° C., and stirring the reactor for 1-7 hours to obtain toluidine. The present invention does not require pre-treatment of the catalyst, and vanadium element powder is directly used as a catalyst in the reaction. The catalyst is simple and easy to obtain, low in price and stable, and catalyzes the reaction of toluene and a hydroxylamine salt under mild reaction conditions to produce toluidine in a single step with high selectivity and yield.